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FSG 52 Measuring Tools

Though our proprietary website ASAP Aerospace, customers of ASAP Semiconductor-ranging from federal contractors to individual buyers in the Aerospace, Aviation, Military and Defense industries-can explore our expansive stock of current and obsolete National Stock Number merchandise.

To methodize the supply chain process, the U.S. Department of Defense set up a system that uniquely and permanently identifies the items that it purchases. This system, titled the National Stock Number (NSN), comprises of 13 digits which are broken down into the 2 following identifying subgroups:

  1. Federal Supply Classification Group - The first 4 digits of the NSN identifies the Federal Supply Class code (FSCG).
  2. National Item Identification Number - The last 9 digits of the NSN identifies the National Item Identification Number (NIIN).

For example, an existing gage we supply at ASAP Semiconductor has a 13-digit NSN of 5220-00-004-5693. The FSCG is represented by 5220, and the NIIN by 000045693.
Likewise, the FSCG and NIIN can be broken down even further into the following classifying subcategories:

  1. Federal Supply Group - The first 2 digits of the FSCG identifies the Federal Supply Group (FSG).
  2. Federal Supply Code - The last 2 digits of the FSCG identifies the Federal Supply Code (FSC).

    In the above gage example, the FSG is represented by 52, and the FSC by 20.

  1. National Codification Bureau - The first 2 digits of the NIIN identifies the National Codification Bureau (NCB) or NATO country code.

  2. Item Serial Number - The last 7 digits of the NIIN is merely an item serial number that does not follow an assignment pattern.

In the above gage example, the NCB is represented by 00 (USA). One FSG we at ASAP Semiconductor stock is FSG 52 - Measuring Tools. Manufacturers for FSG 52 that we carry include: